Feed-finger for automatic screw-machines.



A. G. BELL/URE.

FEED FINGER FOR AUTOMATIC SCREW MACHINES.

APPLICATION msn MAR. si. 1914.

1,142,660., v Patented June 8, 1915.

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ALBERT G.BEI'.LAI1' LE',Y0F nnrnoffr, MICHIGAN.

FEED-FINGER ron AT'OMATC s.c'anw ivriionnviixs.v

Specification of Letters Patent.

Application filed March 31, 1914.` Serial No. 828,508.'

To all 'whom it may concern: i'

Be it known that I, ALBERT p citizen of the Dominion of Canada, residlng at Detroit, in the county lof IVayne and State y of Michigan, have invented new and useful Improvements in Feed-Fingers for Automatic Screw-Machines, of which the following'is af specification.

The invention relates to a feed finger for automatic screw machines comprehending a structure which will accurately fit stock of any sectional contour..

VVThe main objectvof the present invention is the provision of a feed fingerincluding slotted sleeve tapered at the ends toV permit a centralizing ofy the stock and provided with a series of loose gripping dogs adapted` ger within control sleeve.V Fig. 4 is a per-v spective view of one of the dogs. Fig. 5 is a broken sectional View illustrating the application of the improvement.

Referring particularlyto the accompanying drawings, the improved'feeder is designed to fit within theordinaryautomatic feed nger of a screw machine, and in the embodiment presented by 'my invention in-A cludes a sleeve like member -l of uniformv bore throughout and having theends of said Y bore outwardly flaring at 2. The sleeve is formed with longitudinally disposedslots 3 terminating at their forward ends immediately adjacent the forward end of the sleeve. The end walls of the slots are downwardly or inwardly convergent, and dogs 4 are arranged to seat in said slots to engage Gr. BELLAIRE, a

Y the material.` -The dogs are rectangular' in cross section, have their ends inclined to,Y cjonform to the convergent walls ofthe slot and their inner grippingedges of slightly depressed curvature. v

The feeder is adaptedl to fit within. theV feed sleeve 5, which sleeve is longitudinally slotted at 6 the slots extending through the forward end of the sleeve to spring sections 7.

g Invuse, the material is the dogs and locked in such position from the pressure of the stockas tobind the sleeve present spaced on the box.y The lfeed fingers stay in the same position from the time the stock is put y gripped between PatentedfJ une 8, '191,5'. f

into it until the Vbar of stock runs out. The

stockl all revolve at the same time so that the springs remain always on the dogs.

lVhen the stock is fed inton the chuck, the

latter grips the stock andthe feeder slides back'to its regular starting place.

What is claimed is feeder isuscrewed into a cone and the feed, arm controls the cone, feed finger and sleeve combined. The sleeve, feeder, cone and i Y l. A feederfor screw machines including y asleeve having closedk end slots formed lon-Y gitudinally therein, .the end walls of the slots being inwardly convergent, and dogs having correspondingly inclined ends and slidably fitted in the slots, and means for yieldingly holding the dogs inward -of the sleeve.

2. A feeder for screw .machines including a sleeve `having closed end slots formed longitudinally therein, thev end walls of the slots being inwardly convergent, and dogs having correspondingly inclined ends and'slidably fitted-.in the slots, the ends'of the sleeve be-` ingloutwardly flaring, andk means for yieldingly holding the dogs inward of the sleeve.

In testimony whereof I affix my 'signature in presence of two witnesses. 1

-, ALBERT G.- yBELLAIRE. y Witnesses: Y

- JAMES A. MONAHAN,

CHAS. F. GORDON.

Copies of this patent may he. obtained for ve cents each, by addressing the Commissioner of Patents, -Washington, D. C. l Y 

